Compressor



Feb. 14 1933. M. w KENNEY 39 -F'iled March 30, 1951 by INVENTOR.

' Mama W em/1 f TTORNEY Patented Feb. 14, 1933 UNITED STATES IAELON W.KENNE'Y, F ELMEU'RST, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TOGEIGSBY-GRUNOW COMPANY, A CORPOBATIONOF ILLINOIS COMPRESSOR Applicationfiled March 30, 1931. Serial No. 526,312.

This invention relates to compressors and particularly to rotarycompressors. In certain systems, such as refrigerating units, it

is desirable that a compressor operate with a minimum of noise. It hasbeen determined that in such systems, rotary compressors generatedisturbing noises due, in a large measure, to the high frequencypulsations of gas at the exhaust thereof.

An object of this invention is to devise a compressor in which the aboveobjection is eliminated. j v

In general, this object is accomplished by vcausing substantially all ofthe exhaust to occur beneath the surface of a liquid. In

order that such liquid may not be sucked back into the pump upon thestoppage thereof, an auxiliary exhaust vent is provided giving access tothe compressed gas. Thus,

' upon the stoppage of the compressor, the

back flow of high pressure gas will prevent any substantial influx ofliquid.

In the drawing: 1 1 7 I Figure 1 is a sectional view of a compres sorembodying this invention;

Figure 2 is a View on line 2-2 of Figure The compressor comprises a base1 upon which is mounted a bottom bearing plate 2.

Above this bearing plate is rigidly mounted a cylindrical stator body 3whose upper end carries a top bearing plate 4. Bearing plate 4 ispreferably formed integral with an elongated vertically extendingjournal 5. Disposed within stator 3 is a cylindrical rotor I 10 providedwith a plurality of radially'dis posed apertures 11. Within eachaperture is a vane 12, the diametrically opposed vanes having disposedtherebetween pins 15. As is well-known, rotor 10 is eccentricallymounted with respect to stator 3 and upon rotation thereof is adapted tocause vanes 12 to reciprocate. An inlet port 16 and an out-. let port 17are formed in the stator. Rotor 10 bears anupwardly projecting shaft 20adapted to rotate within journal 5. Shaft 20 is threaded at its free endat 21 and may be joined to the armature of an electric *motor shown inoutline for energization.

Base 1 of the compressor has secured thereover a dome 25 with whichoutlet 'port 1? communicates. A pipe 26 leads the compressed gas to anydesired apparatus.

The compressor is preferably adapted to be partially immersed in abodyof liquid 30, preferably lubricant. In order to render the discharge ofthecompressor noiseless, exhaust port 17 communicates with a port 31 inbase 1. This portv 31 is below the level of lubricant 30. In order toprevent any lu bricant from being sucked back into'the compressor uponthe stoppage thereof, I prefer-- ably provide an auxiliary port 35communieating directly with the'high pressure region within dome 25.This port may be obtained by cutting or grinding a small channel in theside of the stator body, Inasmuch as the parts of a compressor of thistype are customarily mlade of hardened steel, this manner of obtainingthe auxiliary port is highly advantageoiis on account of the ease andcheapness of manufacture.

If used in connection with a refrigerating system,'a compressor of thistype,operating on sulphur dioxide with a mineral oil as lubricant, hasbeen found to be operated with a minimum of'noise.

I claim:

1. A rotary compressor comprising a stator body, a rotor eccentricallymounted within said stator body, bearing plates closing the ends of saidstator body, means for mounting said compressor within a chamber intowhich said compressor is adapted to discharge, means for maintaining abody of liquid-in said chamber, said body of liquid being adapted topartially submerge said compressor, exhaust and intake ports for saidcompressor, said exhaust port communicating with said liquid below thesurface thereof and an auxiliary exhaust. port formed in the side ofsaid stator; body and communicating with'the high pressure region insaid chamber.

2. A rotary compressor comprising a cy- 'lindrical stator body disposedso that its axis is vertical, a rotor eccentrically mounted in saidstator, bearing plates closing the ends of said stator, means formounting said'compressor in a chamber into which said compressor isadapted to discharge, means for maintaining a body of liquid jinsaidChemher to partially submerge said compressor, exhaust and intake portsfor said compressor, said exhaust port communicating with said liquidbelow the surface thereof, and a port formed in said stator bodycommunicaa ing with said high pressure region in said chambercommunicating with said exhaust port.

3. A rotary compressor comprising a cylindrical stator body, a rotoreccentrically mounted therein, bearing plates closing the ends of saidstator body, means for supporting said compressor within a chamber intowhich said compressor is adapted to discharge, means for maintaining abody of lubricant in said chamber to partially submerge said compressor,inlet and exhaust ports formed in said compressor, said exhaust portcommunicating with said liquid below the surface thereof and anauxiliary exhaust port communicating directly with said chamber, saidauxiliary port being formed as a channel along the side of said statorbody adjacent one of said bearing plates. Y

4. A rotary com ressor comprising a cylindrical stator bo y providedwith an aperture therethrough parallel with its axis, said aperturecommunicating with the interior of said stator body through a radiallydisposed aperture, a rotor eccentrically disposed within said stator,flat bearing plates closing the ends of said stator, means for mountingsaid compressor within a chamber into which said compressor is adaptedto discharge, means for maintaining a body of lubricant within saidchamber for partially submerging with intake and exhaust ports, achamber having a body of liquid therein, said exhaust port communicatingwith said chamber beneath the surface of said liquid and creating a highpressure region in said chamber above the surface of said liquid, and anauxiliary port communicating with said exhaust port and opening intosaid chamber above said liquid and being just large enough to preventthe influx of liquid into said compressor upon the stoppage thereof.

7 A system of the character described, comprising a compressor, saidcompressor having intake and exhaust ports, means for mounting saidcompressor within a chamber, a body of liquid in said chamber, saidcompressor being adapted to discharge a substantial portion of gasbeneath the surface of said liquid, and an auxiliary conduit openinginto said chamber above the surface-of said liquid and communicatingwith said exhaust port.

In testimony whereof he aflixes his signature.

MAHLON W. KENNEY.

said compressor, one of said bearing plates Y and supporting means beingapertured whereby said exhaust port communicates with said liquid belowthe surface thereof, said stator body'having a channel cut therein alonga side thereof adjacent a bearing plate whereby an auxiliaryexhaust portin direct communication with said chamber is formed.

5. A compressing system comprising a compressor adapted to operate upona gas, said compressor being provided with intake and exhaust ports, achamber having a body of liquid therein in communication with saidexhaust port, said exhaust port being adapted to release a substantialportion of the compressed gases beneath the surface of the liq-' uid,and an auxiliary port within the high pressure region in said chamberabove said liquid in communication with said exhaust port, whereby whenthe compressor stops back-flow of said liquid into said compressor willbe avoided.

6. A systemof the character described, comprising a compressor adaptedto operate on a gas and deliver the same in the form of a series ofpulsations of substantially high frequency, said compressor beingprovided

